netdev - RE: [PATCH 15/17] switch kernel_sendmsg() and kernel_recvmsg() to iov_iter

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Message-ID: <063D6719AE5E284EB5DD2968C1650D6D1CB1E8D4@AcuExch.aculab.com>
Date:	Wed, 15 Apr 2015 09:53:15 +0000
From:	David Laight <David.Laight@...LAB.COM>
To:	'Daniel Borkmann' <daniel@...earbox.net>,
	'Al Viro' <viro@...IV.linux.org.uk>
CC:	"davem@...emloft.net" <davem@...emloft.net>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: RE: [PATCH 15/17] switch kernel_sendmsg() and kernel_recvmsg() to
 iov_iter_kvec()

From: Daniel Borkmann
> Sent: 15 April 2015 10:37
> On 04/15/2015 11:08 AM, David Laight wrote:
> ...
> > Apart from any other code that is using the interface.
> > I know you guys don't do anything to help out of tree code, but removing the setfs()
> > stuff from the kernel_recvmsg() code would break anything using sctp.
> 
> Then that might just be one more incentive to work towards upstreaming
> your out-of-tree SCTP bits ... ;)

You really wouldn't want the many MB of code that generates several MB
of driver object to support a telephony applications using custom hardware.

Almost all the code is completely OS agnostic, the linux 'glue' code is
a few 1000 lines of wrapper functions (compiled as part of the installation
process).
Much the same wrappers exist for windows and solaris.

	David

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